Abstract
The narrow bandwidth and low amplification performance of a subwavelength acoustic resonator greatly limit its applications. In this study, broadband acoustic amplification using an array of two-dimensional quarter-wavelength resonators is investigated. A new acoustic resonator unit is designed, which contains one open end with an impedance-gradient meta-structure and another closed end to confine the acoustic transmission and achieve sound amplification. The sound pressure level (SPL) gain and bandwidth of the resonator can be controlled by changing its geometric parameters. In an energy-harvesting experiment, the broadband amplification resonator provides a 17.2-dB SPL gain and enhanced output voltages.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
